Acquisitions, Investments and Joint Ventures - Additional Information (Detail) (USD $)	3 Months Ended			3 Months Ended	1 Months Ended			1 Months Ended			3 Months Ended			1 Months Ended				1 Months Ended						1 Months Ended								1 Months Ended						1 Months Ended								1 Months Ended		12 Months Ended		1 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011	Mar. 31, 2012 Licensing agreements Year	Apr. 26, 2011 Hardy Way	May 31, 2009 Hardy Way Equity method of accounting	Jun. 03, 2010 Peanuts Worldwide	Jun. 03, 2010 Peanuts Worldwide Licensing agreements Year	Mar. 31, 2012 MG Icon Equity method of accounting	Mar. 31, 2010 MG Icon Equity method of accounting	Mar. 31, 2012 MG Icon Equity method of accounting Minimum	Mar. 31, 2012 MG Icon Equity method of accounting In March 2013	Mar. 31, 2012 MG Icon Equity method of accounting In March 2014	Oct. 26, 2011 Sharper Image	Jul. 27, 2011 Zoo York	Mar. 31, 2012 Scion Cost method of accounting	Dec. 31, 2011 Scion Cost method of accounting	Jun. 30, 2010 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary	Mar. 31, 2009 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary	Mar. 31, 2012 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary	Jan. 31, 2012 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary	Dec. 31, 2011 Scion Cost method of accounting Variable Interest Entity, Not Primary Beneficiary	Nov. 07, 2007 Scion Artful Dodger	Jan. 31, 2012 Parent Company Cost method of accounting Variable Interest Entity, Not Primary Beneficiary	Mar. 31, 2009 Parent Company Cost method of accounting Variable Interest Entity, Not Primary Beneficiary	Sep. 30, 2008 Parent Company Equity method of accounting	May 31, 2011 Novel Equity method of accounting	Jul. 31, 2010 Novel Equity method of accounting	Sep. 30, 2008 Novel Equity method of accounting	Mar. 31, 2012 Novel Equity method of accounting	Sep. 30, 2009 Novel Equity method of accounting	Dec. 09, 2011 Iconix China	Dec. 29, 2008 Iconix Latin America Equity method of accounting	Oct. 31, 2009 IPH Unltd	Mar. 31, 2012 IPH Unltd	Dec. 31, 2011 IPH Unltd	Oct. 31, 2009 IPH Unltd Ecko Assets	Oct. 31, 2009 IPH Unltd Ecko Assets Licensing agreements Year	Nov. 28, 2011 OP Japan	Jan. 31, 2012 Scion Partner Cost method of accounting Variable Interest Entity, Not Primary Beneficiary	Mar. 31, 2009 Scion Partner Cost method of accounting Variable Interest Entity, Not Primary Beneficiary	Mar. 31, 2012 Latin America Territory	Dec. 31, 2011 Latin America Territory	Mar. 31, 2012 Latin America Territory Other assets - current	Mar. 31, 2012 Latin America Territory Other assets	Jan. 31, 2011 Iconix Europe Equity method of accounting	Dec. 31, 2009 Iconix Europe Equity method of accounting	Dec. 31, 2009 Iconix Europe Equity method of accounting	Dec. 31, 2009 Iconix Europe Equity method of accounting Minimum	Jun. 03, 2010 Icon Entertainment LLC Peanuts Worldwide	Jun. 03, 2010 Beagle Scout LLC Peanuts Worldwide	Mar. 31, 2012 Beagle Scout LLC Peanuts Worldwide Other assets - current	Mar. 31, 2012 Beagle Scout LLC Peanuts Worldwide Other assets
Schedule of Investments [Line Items]
Business acquisition purchase price, cash paid						$ 9,000,000								$ 65,600,000																																				$ 172,100,000
Amount deposited into escrow account														2,000,000
Amount held in escrow account period (in month)														6 months
Percentage of ownership interest sold																																							45.00%
Payment received upon sale ownership interest in subsidiary																																							7,400,000
Net gain recognized on sale of interest in subsidiary																																12,700,000							5,600,000
Investment with a cost basis sold, carrying value																																							1,800,000
Guaranteed royalties receivable per year																																							2,000,000
Guaranteed royalties, number of years																																							5 years
Percentage of Companies ownership in OP Japan																																							55.00%
Business acquisition total purchase price						17,000,000				20,000,000					18,000,000								15,000,000
Controlling interest					85.00%	50.00%				50.00%									16.60%																															80.00%
Consideration paid to acquire interest in licensees																			1,000
Contribution made to investment					62,000,000																			1,100,000	2,100,000	2,000,000	3,000,000	4,000,000	8,000,000					63,500,000						1,100,000	2,100,000									141,000,000	34,000,000
Cash collateral deposited under the terms of the entity's financing agreements																			4,100,000		2,200,000
Cash collateral released and distributed to the Scion members																		3,300,000
Remaining cash collateral, restricted cash	26,894,000	3,837,000	14,071,000																			800,000
Cash Collateral paid																				3,000,000
Consolidated assets that are collateral for variable interest entity's obligations																11,300,000	11,600,000
Committed contribution to joint venture																										5,000,000			20,000,000		9,000,000
Future contribution to be made to investment year one																														2,000,000
Investment with a cost basis																																2,600,000
Fair value of investment with a cost basis																																15,300,000
Joint venture ownership interest																																50.00%
Equity earnings on joint ventures	1,298,000	621,000																														6,400,000
Percentage of interest sold in equity method investment																																	50.00%														50.00%	50.00%
Agreed price for sale of interest in a subsidiary																																	6,000,000										4,500,000				4,000,000	4,000,000
Payment received upon sale interest in subsidiary																																	1,000,000													1,000,000	3,000,000
Receivable for investments sold																																	5,000,000									3,800,000		1,400,000	2,400,000
Committed amount receivable period																																	30 months
Period for revenue recognition																																										3 years
Business acquisition purchase price, common stock issued, shares						588,688
Business acquisition purchase price, common stock issued, value						8,000,000
Business acquisition additional common stock issued, value						1,000,000
Cash payment for acquisition of assets					55,000,000
Cash entitled to be received by seller based on certain criteria					7,000,000				3,000,000
Goodwill deductible for income tax purposes					18,800,000		17,700,000																														700,000
Percentage of minority interest in subsidiary																																		49.00%																	20.00%
Percentage of interest in joint venture after transaction																																		51.00%
Indebtedness of joint venture																																		90,000,000
Minimum amortization contractual period of licensing contracts				1				1																														1
Maximum amortization contractual period of licensing contracts				9				5																														9
Consolidated assets that are collateral for variable interest entity's obligations																																			184,200,000	184,500,000
Gain on sale of interest in subsidiary																																																7,000,000
Preferred profit distribution to the Company											23,000,000																																						6,000,000
Acquisition of interest in MG Icon	4,000,000	4,000,000							8,000,000	4,000,000
Additional cash received by seller									1,000,000
Additional installment payment to be received by seller												1,000,000	1,000,000
Business acquisition remaining amount owed to Purim									10,000,000
Business acquisition remaining amount owed to Purim included in other current liabilities									5,000,000
Business acquisition remaining amount owed included in other liabilities									5,000,000
Notes loaned to subsidiary																																																			17,500,000	2,200,000	10,800,000
Notes receivable, annual interest rate																																																			6.00%
Notes receivable, minimum principal annual installments																																																			$ 2,200,000
Notes receivable, maturity date																																																			Jun. 03, 2015